A wireless device receives configuration parameters of: first cell(s) in a first frequency band; and second cell(s) in a second frequency band. A calculated total transmit power for signals is determined that comprise: a first SRS configured for transmission, during a time interval, via the first cell(s); and a second SRS configured for transmission, during the time interval, via the second cell(s). At least one of the first SRS or the second SRS is dropped or scaled based on an SRS transmit power priority of the first SRS and the second SRS when the calculated total transmit power exceeds a first value. The SRS transmit power priority is based on: a frequency band of the first cell(s) or the second cell(s); and whether the first SRS or the second SRS is configured for transmission in the first frequency band or the second frequency band.

In user equipment, a wireless interface circuit simultaneously communicates with two communication networks. A control circuit decides to use a first reserved power of one communication network where URLLC transmission is necessary, and a second reserved power of the other communication network in which the URLLC is not operated, for the URLLC transmission as to the one communication network. The wireless interface circuit transmits URLLC signals over the one communication network, using the first reserved power and the second reserved power.

Disclosed is a communication method and system for converging a 5.sup.th-Generation (5G) communication system for supporting higher data rates beyond a 4.sup.th-Generation (4G) system with the Internet of Things (IoT), and may be applied to intelligent services based on 5G and the IoT-related technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method herein by a terminal in a communication system includes receiving a radio resource control (RRC) message including information associated with a change from a first packet data convergence protocol (PDCP) entity for a bearer to a second PDCP entity for the bearer, identifying first data to be transferred from the first PDCP entity to the second PDCP entity among second data stored in the first PDCP entity, transferring the first data to the second PDCP entity, discarding the second data stored in the first PDCP entity and releasing the first PDCP entity, and processing the transferred first data in the second PDCP entity

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing MCG recovery in dual connectivity in wireless communication system, the method comprising: detecting radio link failure on a master node, wherein the UE is configured with the master node and a secondary node simultaneously; and suspending all secondary cells of the secondary node during the RRC connection re-establishment procedure, and transmitting an indicator indicating the suspension of secondary cells of the secondary node without releasing the secondary cells if the selected cell is one of cells belonging to a cell list.

The invention provides the method that allows UE to simultaneously use 4G and 5G technology when handover from a eNodeB station to eNodeB ENDC base station that supports data transfer on 5G technology platform effectively and optimize deployment costs for current carriers. The method can be widely applied on software and hardware available.

A user equipment (UE) and an operating method of the UE in a communication system are provided. The method includes registering the UE through a first cell using a first access technology; detecting a second cell using a second access technology; receiving a first data through the first cell using the first access technology; and receiving a second data through a second cell using the second access technology, wherein the first cell and the second cell are simultaneously active for the UE, and at least one of the first data and the second data is selectively received through at least one of the first cell and the second cell.

According to an exemplary embodiment, there is provided a method of operating a terminal device, the terminal device being configured to communicate with a first network operating according to a first radio access technology, RAT, and network nodes operating according to a second RAT, wherein the terminal device has a mobility set comprising identifiers for one or more network nodes operating according to the second RAT that can be used for access network selection, traffic steering and/or traffic aggregation, the method comprising on occurrence of a failure condition with respect to a connection to one or more network nodes operating according to the second RAT having an identifier in the mobility set, sending a failure indication message to the first network to signal the occurrence of the failure condition to the first network.

A secondary node (SN) in evolved universal mobile telecommunications system terrestrial radio access network new radio-dual connectivity (EN-DC) with a master node (MN) can directly provide measurement configuration and receive measurement reports from a UE and/or coordinate measurement configuration and reporting with the MN. For example, only one measurement object configuration is allowed for a frequency, but both MN and SN can provide measurement reporting configurations on the same measurement object. The UE can send measurement reports for the same measurement object to both MN and SN or the node that configured the reporting criteria configuration. In another embodiment, only one node provides the reporting configuration but configures the UE to provide reporting to one node or both MN and SN.

Methods, systems, and devices for wireless communications are described. A wireless communications system may support multi-connectivity for a user equipment (UE) with multiple distributed units (DUs) under one central unit (CU), the DUs and the CU belonging to a base station. The UE may establish radio resource control (RRC) connections with multiple cell groups corresponding to multiple DUs under the CU. The UE may transmit measurement reports that provide measurement information for cells in proximity to the UE. The UE may maintain a set of active cell groups and a set of inactive cell groups. In some cases, one or more cell groups may be identified as controlling cell groups used to transmit control information. In some examples, the UE may replicate an uplink packets and transmit the uplink packet and replicates on multiple cell groups. In some cases, the UE may aggregate an uplink transmission among multiple cell groups.

A method of operating a long term evolution (LTE) communication system on a shared frequency spectrum is disclosed. A user equipment (UE) is initialized on an LTE frequency band. A base station (eNB) monitors the shared frequency spectrum to determine if it is BUSY. The eNB transmits to the UE on the shared frequency spectrum if it is not BUSY. The eNB waits for a first time if it is BUSY and directs the UE to vacate the shared frequency spectrum after the first time.